Definition of bagworm
: any of a family (Psychidae) of moths with wingless females and plant-feeding larvae that live in a silk case covered with plant debris; especially : one (Thyridopteryx ephemeraeformis) often destructive to deciduous and evergreen trees of the eastern U.S.
Explore Merriam-Webster
1811
First Known Use of bagworm
1811
Learn More about bagworm
Seen and Heard
What made you want to look up bagworm? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!